Hello all. I recently picked up this photograph with a group of others that belonged to the SS-Fliegersturm circa 1932. I believe this is a Junkers A50 but please correct me if I am wrong. I was wondering what the A9 meant on the side. At first I thought it was a Junkers A9 but I guess there was never a plane with that name. Thank you!

A9 can be a bib number in a competition. There have been such europe-wide in 1929 and 1930, in which the Junkers A 50 (of course it is one) shared. Unfortunately an aircraft with this bib number had no success regarding the records (as I read in Wikipedia).